What is the key difference between Caldav MCP and Kalender Sync?

Caldav MCP belongs to the Workplace & Productivity category with local stdio execution, while Kalender Sync belongs to the Workplace & Productivity category with cloud HTTP/SSE execution.

How do I install Caldav MCP or Kalender Sync in Claude Desktop or Cursor?

Copy the mcpServers JSON configuration snippet provided on this page into your claude_desktop_config.json or ~/.cursor/mcp.json file and restart your AI client.

Are Caldav MCP and Kalender Sync free or paid?

Caldav MCP operates under a Free / Open Source model (API Key required). Kalender Sync operates under a Free / Open Source model (OAuth 2.0).

Which MCP server has more tools and community activity?

Caldav MCP lists 8 tools with 2 views and 14 GitHub stars. Kalender Sync lists 6 tools with 3 views and 0 GitHub stars.

Can I use both Caldav MCP and Kalender Sync together in the same MCP host?

Yes! MCP hosts like Claude Desktop, Cursor, Windsurf, Cline, and VS Code support configuring multiple servers under the mcpServers object simultaneously.

Side-by-Side Model Context Protocol Comparison

Caldav MCP vs Kalender Sync

In-depth architectural comparison of the Caldav MCP and Kalender Sync MCP servers. Compare execution transports, security boundaries, tool capabilities, quality scores, and ready-to-paste client installation snippets for Claude, Cursor, Windsurf, and VS Code.

At a Glance & Executive Verdict

Caldav MCP

Workplace & Productivity · Local stdio

Quality: 55/100 (Good) | Auth: API Key required

Kalender Sync

Workplace & Productivity · Remote HTTP/SSE

Quality: 39/100 (Fair) | Auth: OAuth 2.0

Verdict Summary: Choose Caldav MCP if you need specialized Workplace & Productivity tools running via a local process. Choose Kalender Sync if your workspace requires Workplace & Productivity integration with remote web transport. Both servers can be configured concurrently in your client's mcpServers manifest.

Which MCP Server Should You Choose?

Choose Caldav MCP when:

You need dedicated capabilities in the Workplace & Productivity domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: API Key required (Free / Open Source).
You have access to required keys: CALDAV_URL, CALDAV_USERNAME, CALDAV_PASSWORD.
Primary tools included: caldav_list_calendars, caldav_create_event, caldav_get_events.

Explore Caldav MCP Details

Choose Kalender Sync when:

You need dedicated capabilities in the Workplace & Productivity domain.
You prefer remote streaming HTTP/SSE transport architecture.
Your security boundary fits: OAuth 2.0 (Free / Open Source).
Primary tools included: MCP-based calendar access, Google calendar support, Microsoft 365 calendar support.

Feature & Specification Comparison

Specification	Caldav MCP madbonez Workplace & Productivity	K Kalender Sync Workplace & Productivity
Summary	Universal MCP server for CalDAV protocol integration. Works with any CalDAV-compatible calendar server including Yandex Calendar, Google Calendar (via CalDAV), Nextcloud, ownCloud, Apple iCloud, and others. Supports creating events with recurrence, categories, priority, attendees, reminders, searching events, and retrieving events by UID.	GDPR-compliant calendar access for AI assistants: Google, Microsoft 365, Apple, CalDAV. EU-hosted.
Category & Scope	Workplace & Productivity

Tools & Capabilities Breakdown

Caldav MCP Tools (8)

caldav_list_calendars

List all available calendars

caldav_create_event

Create a new calendar event (supports recurrence, categories, priority, attendees)

caldav_get_events

Get events for a date range (returns extended fields: UID, categories, priority, attendees, recurrence)

caldav_get_today_events

Get events for today

caldav_get_week_events

Get events for the week

caldav_get_event_by_uid

Get a specific event by its UID

Ready-to-Paste Client Configurations

Paste either (or both) of these JSON server blocks into your client config file (e.g. claude_desktop_config.json or ~/.cursor/mcp.json).

Caldav MCP Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "madbonez-caldav-mcp": {
      "command": "uvx",
      "args": [
        "mcp-caldav"
      ],
      "env": {
        "CALDAV_URL": "YOUR_CALDAV_URL_HERE",
        "CALDAV_USERNAME": "YOUR_CALDAV_USERNAME_HERE",
        "CALDAV_PASSWORD": "YOUR_CALDAV_PASSWORD_HERE"
      }
    }
  }
}

Kalender Sync Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "kalender-sync": {
      "url": "https://kalender-sync.de/en/mcp"
    }
  }
}

Frequently Asked Questions

Caldav MCP is categorized under Workplace & Productivity and uses a local stdio subprocess. In contrast, Kalender Sync belongs to Workplace & Productivity using remote streaming HTTP/SSE transport. Select Caldav MCP when you need capabilities focused on workplace & productivity and Kalender Sync when you require tools for workplace & productivity.

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